Apparatus for adjusting elevation of guns.



No. 647,232. Patented Apr. 10, I900.

J. KRONE.

APPARATUS FOR ADJUSTING ELEVATION 0F GUNS.

(Application filed Jan. 23, 1900.) (No Model.) 7 3 Sheets-Sheet l.

No. 647,232. 'Patented Apr. I0, I900. A

'J. KRONE. A APPARATUS FOR ADJUSTING ELEV-ATIUN 0F GUNS. (Application filed J's-n. 28, 1900.) (No Model.) 3 Sheets-Shut 2.

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Nd. 647,232. Patented Apr} 10, I900. J. KRONE. APPARATUS FOR ADJUSTING ELEVATION 0F GUNS.

(Application filed Jan. 28, 1900.)

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UNITE STATES PATENT ()EtucE.-

JOHANNES KRONE, OE ES SEN, GERMANY, ASSIGNOR TO FRIED. KRUPP, OF

SAME PLACE.

APPARATUS FOR ADJUSTING ELEVATION OF GUNS.

SPECIFICATION forming part of Letters Patent No. 647,232, dated April 10, 1900.

g Application filed January 23,1900. Serial No. 2,440. (Nomodeld To CLZZ whom it may concern; different colors above and below the curve. Be it known that I, J OHANNES KRONE, en, The index-hand e, which moves over the plate, gineer, a citizen of the German Empire, residis hollow and carries at its lower end an iningat 56 Bismarckstrasse,Essen-on-the-Ruhr, candescent lamp Z and an inclined mirror 19. 5 Germany, haveinvented certain new and use- At its center the latter is provided with a ful Improvements in Apparatus for Adjustsmall opening, opposite which the Wall of the ing the Elevation of Guns, of which the foltube has likewise an opening, so that through lowing is a specification. the two openings the incandescent lamp illu- My invention has reference to improve minates a part of the index-plate. The like 60 to ments in apparatus for adjusting the eleva- Wise hollow index-shaft c is cut off at the tion of guns, such as described in United center, and where the two index-hands join States Letters Patent No. 639,407, granted to the same there is a mirror 19 one on each me December 19, 1899, which latter apparaside, The shaft 0 turns within bearings b I) tus consists, essentially, in an index-hand adof the fixed standard a, as well as on jour- 15 jnstable to the proper angle for distance and nals n n in fixed bearings d d. The shaft is difference oflevel and anindeX-curve marked turned by means of the worm-sector t, the upon an index-plate secured to the gun or hand-wheel r and the worm-wheel q resting cradle at right angles to the axis of the trunin bearings of the frame 8. The box-shaped nions, the index-hand being first adjusted to frame 8 is arranged to turn on the shaft 0 by 20 the proper angle and the gun then turned on turning the hand-wheel y, the worm-wheel 50, v

the trunnions until a fixed point of the inand the worm-sector z in the same manner as deX-hand intersects the index-curve, wherein the above-mentioned Letters Patent. The upon the gun is in proper position for firing. frame is made in one piece with a hollow pro- My present invention has for its object to jection i, the two lateral openings 76 of which 25 so arrange the apparatus as to permit the receive the inner ends of the shaft 0. The gunner without leaving his position at sightprojection '5 serves for the reception of the ing to observe the relative positions of the intelescope-carrier m, which consists of a T- deX-hand and of the index-plate, and thus to shaped pipe. This latter is cut off semicy- Watch the elevation of the gun. For this lindrically (corresponding to its intersection 80 3o purpose, according to my present invention, with the shaft 0) at its lower end which prothe index-hand and the index-shaft are made jects down into the hollow shaft and is prohollow and are on the inside provided withv a vided with two inclined mirrors f. Into the system of mirrors by which an image of the upper cross-piece o the sighting-telescope v is part of the index-plate facing the end of the placed. Just above the vertical part of the 35 index-hand is transferred to the telescope. carrier m the telescope has an opening it cor- My-invention is shown in the annexed drawresponding to its clear diameter and above ings as applied to twin guns. the opening on the inside an inclined reflect- In the drawings, Figure 1 is a rear end view ing-diaphragm p of the apparatus; Fig. 2, a vertical cross-sec- The operation of the arrangement is as fol- 40 tion, and Fig. 3 a longitudinal section. lows: In adjusting the elevation of the gun The arrangement of theindex-plate and the the index-plate moves past the lower end of index-hand in relation to each other and to the index-hand and the part of the plate illuthe gun, as well as the means by which the minated at the time is reflected by the miradjustment of the index-hand and of the derors p,19 and p to the diaphragm 1). Con- 45 vice for sighting is effected, is the same as desequently within the field of view of the tele scribed in the above-mentioned Letters Patscope the images of the surfaces illuminated ent, small changes only being made which are on both sides appear side by side. The gun necessary by making the axis hollow. ner will recognize by the color of the image The index-curve 9 his by preference made whether the gun is elevated too much or too mo 50 of a narrow strip of polished metal, while the little and can change theelevation accordsnrfaces f f of the index-plate are made in ingly until the image of the curve itself appears in the field of view of the telescope cutting the parts of the horizontal Wire to the right and left of the intersection of the crosswires in the middle. As soon as this happens the correct adjustment of the elevation of the gun is reached. By preference the color of the index-plate is made to increase in darkness from thecurve outward, so that by the shade of the color of the image the approaching to the proper adjustment is recognized. Instead of making the curve of a polished strip it might also be formed as a dark line upon a light ground. It would also be possible to get the image of the curve as a point by the-interposition of a lens.

Itis evident that the illumination of the index-plate might be effected by other means than the lamp within the indeX-handfor instance, the index-plate might be made diaphanous and illuminated from the rear.

What I claim as new is 1. In an apparatus for adjusting the elevation of guns of the character specified having an index-plate and an index-hand, a hollow index-hand and hollow index-axle provided with a system of mirrors reflecting the image of the part of the index-plate before the end of the index-hand into the telescope, substantially as specified.

2. In an apparatus for adjusting the elevation of guns of the character specified having an indeX-plate and an index-hand, a hollow index-hand and hollow index-axle provided with a system of mirrors refiectingthe image of the part of the index-plate before the end of the index-hand into the telescope, the index-curve being formed by a narrow strip differing in color from that of the index-plate, substantially as specified.

3. In an apparatus for adjusting the elevation of guns of the character specified having an index-plate and an index-hand, a hollow index-hand and hollow index-axle provided with a system of mirrors reflecting the image of the part of the index-plate before the end of the index-hand into the telescope, the divisions of the index-plate made by the indexcurve being differently colored, substantially as specified.

4. In an apparatus for adjusting the elevation of guns of the character specified having an index-plate and an index-hand, a hollow index-hand and hollow index-axle provided with a system of mirrors reflecting the image of the part of the index-plate before the end of the index-hand into the telescope, and an incandescent lamp arranged at the lower end of the hollow index-hand for illuminating a limited'field of the index-plate through'an opening in the index-hand, substantially as specified. 4

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

JOHANNES KRONE.

Witnesses:

VVILLIAM EssENwErN, P. LTEBER. 

